Plaster-receiving board



Nov. 23 ,1926. 1,608,081

H. A. CUMFER PLASTER RECEIVING BOARD Filed August 17, 1922 2 Sheets-Sheet 1 ZIIIIII'IIIIIIIIIIIIIIIIVIIII I I I Nov. 23,1926. 1,608,081

H. A. CUMFER 1 PLASTER RECEIVING BOARD Filed August 17, 1922 2 Sheets-Sheet, 2

. receive plaster, the inner v UMTEDTSTATES PATENT orrics.

nanny A. cuurrnn. or cnroaeo, mm

DIS, ASSIGNOR 0F ONEHALF TO ALBERT D.

STEWART, or nu'rcnrnson, KANSAS.

rnnsrnanncnrvrne 30am) Application filed August 17, 1922. Serial No. 582,344.

The invention relates to plaster-receiving board or composition lath.

One of theobjects of the invention improve is to the constructlon of plaster receiving boards of the typemade of two associated sheets, of which one is imperforate, by

pro-

viding a structure that may conveniently be made by a strip or sheet of suitable material.

Another object is machine from a constantly moving to provide improved means for securing the sheets together and to the supporting wall.

A further object is to provide pocket plaster s for between the two sheets by pressing parts of one or both sheets out of normal planes and cementin the displaced parts to 25 the inner surface of the pockets or channels.

Another object the other sheet within is to provide a structure,

of the class described, in which alternate channels are not so wide as the intermediate,

plaster-containing channels.

Another object is to 'ceiving structure made the outer sheet having closed impertorate channel, like walls 0 channels being cemented together.

Other objects and advantages of th vention will hereinafter appear from a provide a plasterueof two united sheets, perforate channels to sheet having an inf the e inconsideration of the following description, when taken in conjunction with the drawings,

wherein Fig. 1 is a sectional view of one form of my invention.

Fig. 2 is a plan view of Fig. 1 showing parts in section.

Fig. 3 is a section on line 3-3 ofFig.

of another form myinvention may take.

Fig. 4 is a plan view of Fig. 3. Fig. 5 is a sectional which my invention may take. Fig. 6 is a reduced plan view taken on line 6-6 of Fig. 5.

Fig. 7 is a Fig. 8 showing another variation.

view of another form and section section taken on line 7-7 of Fig. 8 ms reduced plan view of Fig. 7.

Fig. 9 is a similar view of a similar strueture.

arts.

The structure is made of two sheets of suitable material having composite po ckets outer surface, provided by displacement of portions of either sheet, the displaced portions of one sheet being cemented or otherwise secured to the other sheet.

In every instance the outer sheet is perforated to permit the plaster to enter the pockets or channels between the sheets and the inner or base sheet is imperforate to make the structure wind and water proof.

A suitable substance of which to make the 55 structure is composition roofin made of a fibrous base 50f felt, or the li e, saturated with a water-resistant such as asphaltum or a compound thereof and coated on both sides with similar material 6, more or less plastic when warm and which forms a strong cement when cold. The lower or base sheet 7 is imperforate. The upper or outer sheet 8 is formed into channels 9 and 10. The alternate channels 9 may be wider than the intermediate channels 10. s

The smaller channels are utilized to nail both'sheets to the supporting wall 11.

inner surface of the wall 14 ofthe channel The channels 9 may be perforated at intervals in their side walls, as at 16, and in the intermediate walls 14, as at 17 and 17'.

In Figs. 3 and 4 the outer sheet 8 is slotted longitudinally at intervals to provide plaster receiving openings" and the tongues 12 are bentinwardly and cemented to the upper surface of the sheet 7. In Figs. 7 and 8 the slits are made so as to divide the tongues to provide base portions 20 which are parallel with the base sheet and cemented thereto. This affords a larger surface contact than the form shown in Fig. 3. The parts 12-12' and 12 torin strengthening projections extending from one sheet and cemented to the other sheet within the plaster-receiving channels 9. The side walls of Figs. 4: to 9, inclusive, may also contain openings 16 t suitable intervals; 

